- Improved developer experience with API docs, new log levels, @Redirect decorator, async NestModule.configure, beforeApplicationShutdown hook, and resolve() for scoped providers.
- Boosted microservices capabilities: hot observables for emit, nextTick scheduling for performance, added serializers/deserializers, proper argument passing to request‑scoped proxies, and corrected isTerminated handling.
- Fixed several core and platform issues including null onModuleInit guard, request‑scoped middleware bug, method handler conflicts, Express Multer PreservePath property location, and migrated CI to CircleCI.
v6.6.0
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Fixed early return issue causing Server-Sent Events (SSE) aborts in core
Fixed multiple core, common, and fastify issues: shared singleton providers, regex file type matching, route wildcard conversion, middleware prefix handling, lazy module scanning, and enum validation.
Added an override mimetype option to the file‑type validator and introduced SSE comment support in the core module